KR102458252B1 - Electronic control device - Google Patents

Abstract

An electronic control device having a pressure compensating member including a tamper-preventing configuration of the electronic control device is provided.
The electronic control device according to an embodiment of the present invention includes a housing, a printed circuit board provided in the housing, and a coupling portion formed in the housing, inserted into the housing and fixed to the central portion of the printed circuit board. It is characterized in that it includes a pressure compensating member.

Description

ELECTRONIC CONTROL DEVICE

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic control device, and more particularly, to an electronic control device having a pressure compensating member including a tamper-preventing configuration of the electronic control device.

In general, an electronic control device such as an ECU (Electronic Control Unit) for electronically controlling various devices is mounted on a vehicle. The electronic control device receives information from sensors or switches installed in each part of the vehicle. The electronic control device functions to control the vehicle by processing the received information, to perform various electronic controls to improve ride comfort and safety of the vehicle, or to provide various conveniences to drivers and passengers.

For example, electronic control devices that control the state of a vehicle's engine, automatic transmission, ABS (Anti-Lock Brake System), etc. with a computer, such as ECU, have developed along with the development of vehicle and computer performance, including automatic transmission control, drive system, and It even plays a role in controlling all parts of the vehicle such as the braking system and the steering system.

Electronic control devices such as ECUs include a case composed of an upper cover and a lower base, a printed circuit board (PCB) accommodated inside the case, and a connector coupled to the front end of the PCB for connecting an external socket, etc. It consists of a structure containing

In the case of the electronic control device as described above, since it has a highly integrated control circuit means, a predetermined sealing structure is required to prevent the inflow of external moisture or foreign substances into the interior, and usually between the cover and the base and the connector. A sealing structure that protects the internal PCB is applied by assembling the cover and the base together with the connector while the sealing material is inserted in the binding area.

Meanwhile, in the case of the prior art, since the electronic control device as described above is completely sealed by the sealing structure, the pressure inside and outside the control device is different. This keeps the internal and external pressure constant.

In the case of a conventional electronic control device, the pressure compensating device is implemented in a form provided in a connector, etc., but in the case of a conventional electronic control device having a pressure compensating device as described above, it cannot perform a separate function other than the atmospheric pressure compensating function. There was a disadvantage in that it was necessary to separately provide a device modification prevention configuration or a PCB resonance point fixing configuration.

Registered Patent Publication No. 10-1816035

It is an object of the present invention to provide an electronic control device having a pressure compensating member including a tamper-resistant configuration of the electronic control device.

Another object of the present invention is to provide an electronic control device capable of supplementing the resonance weakness of a printed circuit board in a high vibration environment.

The electronic control device according to an embodiment of the present invention includes a housing, a printed circuit board provided in the housing, and a coupling portion formed in the housing, inserted into the housing and fixed to the central portion of the printed circuit board. It is characterized in that it includes a pressure compensating member.

Preferably, the coupling part is formed in the lower part of the enlarged diameter and the enlarged diameter, and it is characterized in that it comprises a reduced diameter portion having a smaller diameter than the enlarged diameter.

Preferably, the pressure compensating member includes an atmospheric pressure compensating part seated on the enlarged diameter part and an insertion part extending from a lower portion of the atmospheric pressure compensating part, and partially inserted into the housing through the coupling part, the housing; A portion of the insert inserted into the inside passes through a board hole formed in the printed circuit board.

Preferably, the atmospheric pressure compensating unit includes a body portion, a ventilation hole formed in the body portion, formed in the center of the body portion, a ventilation member receiving portion accommodating a breathable member thereon, and formed in the ventilation member receiving portion, and communicating with the insertion portion. And, on the body portion, characterized in that it comprises a plurality of engaging portions formed to protrude in the vertical direction to the outer portion of the air-permeable member accommodating portion, and a cap portion coupled to the body portion through the engaging portion.

Preferably, a gap is formed between the plurality of locking parts, and the air permeable member distributes air between the inside and the outside of the housing through the gap.

Preferably, the inlet of the ventilation hole is characterized in that it is formed in a streamlined shape.

Preferably, a unique code printing unit indicating a unique code of the pressure compensating member is provided on the upper portion of the cap.

Preferably, the insertion part includes a plurality of fixing parts having one end extending downward from the air-permeable member receiving part, and formed adjacent to one end of the fixing part on an outer circumferential surface of the fixing part, and passing through the reduced diameter part. It characterized in that it comprises a housing fixing portion fixed to the end of the reduced diameter portion and a substrate fixing portion formed adjacent to the other end of the fixing portion on the outer peripheral surface of the fixing portion, fixed to the printed circuit board.

Preferably, the other end of the fixing part passes through the substrate hole and is in contact with the lower inner surface of the housing.

Preferably, the upper portion of the housing fixing portion is formed to protrude horizontally in a radial direction from the outer peripheral surface of the fixing portion, and is characterized in that the diameter is larger than that of the substrate fixing portion.

Preferably, the housing fixing portion is characterized in that the diameter is formed to decrease from the top to the bottom.

Preferably, the board fixing part includes a board fixing groove inserted into the printed circuit board on a horizontal plane, and the board fixing groove is coupled to the printed circuit board at a portion where the board hole is located.

Preferably, the reduced diameter portion is formed to correspond to the shape of the housing fixing portion.

Preferably, the plurality of fixing parts are spaced apart from each other while the housing fixing part passes through the reduced diameter part, and after the housing fixing part passes the reduced diameter part, it is characterized in that they are arranged to be spaced apart from each other in a radial direction. .

Preferably, the substrate hole is formed in a central portion of the printed circuit board.

Preferably, the pressure compensating member is inserted into the outer peripheral surface of the fixing part, characterized in that it further comprises a sealing part disposed between the atmospheric pressure compensating part and the housing fixing part.

Preferably, the sealing part is characterized in that it is seated on the reduced diameter part.

Preferably, it further comprises a connector coupled to the opening of the housing and electrically connected to the printed circuit board.

According to the present invention, when the pressure compensating member is arbitrarily disassembled or replaced in the electronic control device through the unique code printing unit provided in the pressure compensating member, the user can easily check whether the pressure compensating member is arbitrarily disassembled or replaced.

In addition, when the pressure compensating member is arbitrarily disassembled or replaced in the electronic control device according to the double fastening structure for the housing and the printed circuit board of the pressure compensating member, the user can check the damage of the pressure compensating member or the damaged printed circuit board. It can be easily checked whether the compensating member is disassembled or replaced.

In addition, since the pressure compensating member can fix the central portion of the printed circuit board, it is possible to compensate for the resonance weakness of the printed circuit board without a separate fixing device.

In addition, it is possible to maintain the same pressure inside and outside the electronic control device with one pressure compensating member, to easily check whether the electronic control device is modified, and to compensate for the resonance weakness of the printed circuit board without a separate fixing device. Therefore, it is possible to reduce the cost in manufacturing the electronic control device.

1 is a view showing an electronic control device according to an embodiment of the present invention.
2 is a view showing the overall shape of the pressure compensating member provided in the electronic control device.
3 is an exploded view illustrating an atmospheric pressure compensating unit among the pressure compensating members.
4 is a view showing a process of disposing a breathable member on the pressure compensating member.
5 is a view showing a process of coupling the pressure compensating member to the electronic control device.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in adding reference numerals to the components of each drawing, the same components are given the same reference numerals as much as possible even though they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, preferred embodiments of the present invention will be described below, but the technical spirit of the present invention is not limited thereto or may be variously implemented by those skilled in the art without being limited thereto.

1 is a diagram illustrating an electronic control device 100 according to an embodiment of the present invention. At this time, FIG. 1 shows a cross-section at approximately the center of the electronic control device 100 .

Referring to FIG. 1 , an electronic control device 100 according to an embodiment of the present invention includes a housing 10 , a printed circuit board 20 provided in the housing 10 , and a housing 10 . It includes a connector 30 coupled to the opening of the housing 10 and a pressure compensating member 40 fixed to the printed circuit board 20 .

At this time, the housing 10 may be formed by injection into an integral housing, or may be formed of a cover (not shown) and a base (not shown) that are vertically coupled.

At least one electronic device (not shown) may be formed on one surface (a portion facing the lower inner surface of the housing 10 ) of the printed circuit board 20 . Preferably, the electronic device may be formed adjacent to the lower inner surface of the housing 10 , and heat emitted from the electronic device may be radiated through the lower surface of the housing 10 .

The connector 30 includes a connector terminal 32 , and may be mechanically and electrically connected to the printed circuit board 20 through the connector terminal 32 . Preferably, the connector 30 is electrically connected to an external electronic device (not shown) so that the electronic control device 100 can perform various electronic controls.
The connector 30 is coupled to the housing 10 . One side of the connector 30 is inserted into the opening 11 provided on one side of the housing 10 to be electrically connected to the printed circuit board 20 inside the housing 10 .

Referring to FIG. 1 , a coupling portion 12 in the form of a hole whose diameter decreases toward the bottom may be formed at approximately the center of the upper surface of the housing 10 .

The coupling portion 12 includes an enlarged diameter portion 122 and a reduced diameter portion 124 that is formed under the enlarged diameter portion 122 and has a smaller diameter than the enlarged diameter portion 122 .

The above-described pressure compensating member 40 may be inserted into the housing 10 through the coupling portion 12 and fixed to the central portion of the printed circuit board 20 .

In detail, the pressure compensating member 40 is formed extending from the lower portion of the atmospheric pressure compensating section 42 and the atmospheric pressure compensating section 42 seated on the enlarged diameter section 122 , and a portion of the housing through the coupling section 12 . (10) includes an insertion portion 44 to be inserted therein.

At this time, a portion of the insertion part 44 inserted into the housing 10 may pass through the board hole 22 formed in the printed circuit board 20 . Preferably, the board hole 22 may be formed in a substantially central portion of the printed circuit board 20 .

FIG. 2 is a view showing the overall shape of the pressure compensating member 40 provided in the electronic control device 100, and FIG. 3 is an exploded view showing the atmospheric pressure compensating unit 42 of the pressure compensating member 40, FIG. 4 is a view showing a process of disposing the breathable member 423 on the pressure compensating member (40). At this time, FIG. 4 (a) of FIG. 4 is a view showing a state before the air permeable member 423 is disposed in the air permeable member receiving portion 422, and FIG. 4 (b) is the air permeable member receiving portion 422. It is a view showing a state in which the member 423 is disposed.

2 to 4 , the atmospheric pressure correcting unit 42 includes a body portion 421 formed in a disk shape, a breathable member receiving portion 422 , a breathable member 423 , a ventilation hole 424 , a plurality of hooks It includes a portion 425 and a cap portion 426 .

3 and 4 , the breathable member accommodating part 422 may be formed in the center of the body part 421 , and the breathable member 423 may be accommodated thereon.

Preferably, the air permeable member 423 may be coupled to the upper portion of the air permeable member accommodating part 422 through a laser welding method or the like as shown in FIGS. 3 and 4 ( b ).

In addition, as the breathable member 423 , a membrane film including a plurality of nanopores may be used so that air between the inside and outside of the housing 10 may be circulated. In an embodiment of the present invention, the membrane film is a thin film having hydrophobicity, and it is preferable that AC (Acrylic Copolymer), PES (Poly Ether Sulfone), PTFE (Poly Tetra Fluoro Ethylene)-based resin, etc. is selected, but it is not limited thereto not.

The hydrophobic air-permeable member 423 as described above allows air to pass through, but may block the passage of external moisture or foreign substances.

A ventilation hole 424 communicating with the insertion portion 44 may be formed in a substantially central portion of the ventilation member accommodating portion 422 . Preferably, as shown in FIGS. 3 and 4 ( a ), the inlet of the vent hole 424 is formed in a streamlined shape, so that when air is circulated between the inside and outside of the housing 10 through the vent member 423 , it is breathable. It is possible to prevent damage to the member 423 .

2 to 4 , the engaging portion 425 may be formed to protrude vertically from the outer portion of the breathable member accommodating portion 422 on the body portion 421 . Preferably, the locking part 425 may be formed in plurality along the circumferential direction of the body part 421 at the edge of the body part 421 .

2 and 3 , the cap part 426 may be coupled to the body part 421 through the locking part 425 . Preferably, the lower end of the cap portion 426 may be fitted to the locking portion 425 .

In addition, a unique code printing unit 4261 indicating a unique code of the pressure compensating member 40 may be provided on the cap portion 426 . When the pressure compensating member 40 is arbitrarily disassembled or replaced in the electronic control device 100 through the unique code printing unit 4261, the user can easily check whether the pressure compensating member 40 is arbitrarily disassembled or replaced. have.

1 to 3, the insertion portion 44 has a plurality of fixing portions 442, one end of which is formed to extend downwardly from the air permeable member receiving portion 422, and the high on the outer circumferential surface of the fixing portion 442. A housing fixing part 444 formed on one end of the top 442 and a board fixing part 446 formed on the other end of the fixing part 442 on the outer circumferential surface of the fixing part 442 and fixed to the printed circuit board 20 . ) is included.

Referring to FIG. 1 , a part of the fixing part 442 is located in the aforementioned reduced diameter part 124 , and the other end of the fixing part 442 may pass through the board hole 22 of the printed circuit board 20 . . Preferably, the other end of the fixing part 442 may pass through the substrate hole 22 and come into contact with the lower inner surface of the housing 10 .

In addition, the fixing portion 442 is formed to extend from a plurality of the breathable member receiving portion 422 as shown in FIGS. 1 to 3 , and each fixing portion 442 has one end of the breathable member receiving portion 422 . It can be formed to be spaced apart from each other in the radial direction in a state connected to.

The housing fixing part 444 passes through the reduced diameter part 124 to be fixed in contact with the end of the reduced diameter part 124 . can

The board fixing part 446 includes a board fixing groove 4462 inserted into the printed circuit board 20 on a horizontal plane. The board fixing groove 4462 may be coupled to the printed circuit board 20 at a portion where the board hole 22 of the printed circuit board 20 is located.

In this case, the upper portion of the housing fixing part 444 may have a larger diameter than the substrate fixing part 446 .

In detail, as shown in FIGS. 1 to 3 , the housing fixing part 444 has an upper portion protruding from the outer circumferential surface of the fixing part 442 horizontally in the radial direction, and the diameter decreases from the top to the bottom. can be formed.

1 to 3 , the pressure compensating member 40 is inserted into the outer peripheral surface of the fixing part 442 and further includes a sealing part 46 disposed between the atmospheric pressure compensating part 42 and the housing fixing part 444 . include Preferably, the sealing part 46 may be formed of a material such as silicone or rubber having good waterproof properties.

As shown in FIG. 1 , the sealing part 46 is connected to the reduced diameter part 124 when the pressure compensating member 40 is inserted into the housing 10 through the coupling part 12 of the housing 10 . can be seated

The sealing portion 46 seated on the reduced diameter portion 124 may seal the gap between the reduced diameter portion 124 and the fixing portion 442 as shown in FIG. 1 .

Meanwhile, the atmospheric pressure compensating part 42 and the insertion part 44 of the pressure compensating member 40 may be integrally injected and formed except for the breathable member 423 and the cap 426 . Preferably, the atmospheric pressure correction unit 42 and the insertion unit 44 may be made of a plastic synthetic resin material having elasticity.

5 is a diagram illustrating a process of coupling the pressure compensating member 40 to the electronic control device 100 . At this time, FIG. 5 (a) of FIG. 5 is a view showing a state before the pressure compensating member 40 is fixed to the housing 10 and the printed circuit board 20, and FIG. 5 (b) is a pressure compensating member ( 40 is a view showing a state in which the housing 10 and the printed circuit board 20 are fixed.

Referring to FIG. 5 ( a ), when the insertion part 44 of the pressure compensating member 40 is inserted into the housing 10 through the coupling part 12 , first, the other end of the fixing part 442 and the substrate The fixing part 446 may be inserted into the housing 10 through the coupling part 12 .

As described above, the housing fixing part 444 may have a larger diameter than the substrate fixing part 446 , and may be formed to have a smaller diameter as it goes from the top to the bottom. Preferably, the shape of the reduced diameter portion 124 may also be formed such that the diameter decreases from the top to the bottom to correspond to the shape of the housing fixing part 444 .

In the state of FIG. 5 ( a ), while the housing fixing part 444 passes through the reduced diameter part 124 , the reduced diameter part 124 and the housing fixing part 444 come into contact with each other and the mutual relationship between the respective fixing parts 442 . The gap can be small.

As described above, since the mutual distance between each fixing part 442 is reduced, the diameter of the other end of the fixing part 442 and the upper part of the housing fixing part 444 is smaller than that of the substrate as shown in FIG. 5(a). The fixing part 446 may smoothly enter the board hole 22 of the printed circuit board 20 .

In addition, since the housing fixing part 444 is formed to have a smaller diameter from the upper part to the lower part, it can smoothly pass through the reduced diameter part 124 of the coupling part 12 .

Referring to Figure 5 (b), after the housing fixing portion 444 passes through the diameter reduction portion 124, the atmospheric pressure correction unit 42, specifically, the body portion 421 of the atmospheric pressure correction unit 42) is expanded It is seated on the neck portion 122 , and the sealing portion 46 may be seated on the reduced diameter portion 124 .

On the other hand, after the housing fixing portion 444 passes through the reduced diameter portion 124 , the distance between each fixing portion 442 that became smaller while passing through the reduced diameter portion 124 is increased again, so that each fixing portion 442 is increased again. ) may be arranged to be spaced apart from each other in the radial direction as shown in FIG. 5(b).

As described above, since the respective fixing portions 442, which have been reduced in distance from each other while passing through the reduced diameter portion 124, are arranged to be spaced apart from each other in the radial direction again, the substrate fixing portion 446 is formed in the substrate hole ( 22) can be smoothly fixed to the printed circuit board 20 at the position.

In addition, the housing fixing portion 444 passing through the reduced diameter portion 124 may have an upper portion in contact with the end of the reduced diameter portion 124 to be fixed to the end of the reduced diameter portion 124 .

Accordingly, as shown in FIG. 5( b ), the housing fixing part 444 of the insertion part 44 is fixed to the housing 10 , and the substrate fixing part 446 is fixed to the printed circuit board 20 , so that the pressure The compensating member 40 may be fixed to the electronic control device.

According to the double fastening structure in which the above-described housing fixing part 444 is fixed to the housing 10 and the substrate fixing part 446 is fixed to the printed circuit board 20, any disassembly or replacement of the pressure compensating member 40 is not possible. When this occurs, the printed circuit board 20 to which the housing fixing part 444 or the substrate fixing part 446 fixed to the end of the reduced diameter part 124 is fixed may be damaged. Accordingly, the user can easily check whether the pressure compensating member 40 is arbitrarily disassembled or replaced.

In addition, since the board fixing part 446 is fixed to the printed circuit board 20 at the portion where the board hole 22 located in the approximately central part of the printed circuit board 20 is located, the central part of the printed circuit board which is vulnerable in a high vibration environment Since it can be fixed, it is possible to compensate for the resonance weakness of the printed circuit board 20 without a separate fixing device (eg, a screw).

2 to 5 , a gap 4252 may be formed between the plurality of locking parts 425 . At this time, the aforementioned air permeable member 423 may flow air between the inside and outside of the housing 10 through the gap 4252 .

More specifically, in the state of Figure 5 (b), through the gap between the plurality of fixing parts 442, the vent hole 424 and the gap 4252 so that the air flow between the inside and the outside of the housing 10 is made. An air passage may be formed.

Accordingly, the air inside and outside the housing 10 may be circulated through the air permeable member 423 accommodated in the air permeable member accommodating part 422 through the air passage as a passage.

With the above-described configuration, the pressure compensating member 40 is coupled to the housing 10 so that the internal and external pressures of the electronic control device 100 can be maintained the same.

According to the present invention, one pressure compensating member 40 maintains the same pressure inside and outside the electronic control device 100 , and it is possible to easily check whether the electronic control device 100 has been modified or not, and a separate Even without a fixing device, it is possible to compensate for the resonance weakness of the printed circuit board 20 . Accordingly, it is possible to reduce the manufacturing cost of the electronic control device 100 .

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are for explaining, not limiting, the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed by the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

100: electronic control unit
10: housing
20: printed circuit board
30: connector
40: pressure compensating member

Claims (18)

housing;
a printed circuit board provided inside the housing; and
a pressure compensating member inserted into the housing through a coupling portion formed in the housing and fixed to the central portion of the printed circuit board; and
The coupling part,
diaphragm and
It includes a reduced diameter portion formed under the enlarged diameter portion,
The pressure compensating member,
Atmospheric pressure correction unit seated in the enlarged diameter part, and
Including an insert extending from the lower portion of the atmospheric pressure correction unit,
The atmospheric pressure correction unit,
body part,
A breathable member accommodating portion formed in the center of the body portion and accommodating the breathable member thereon;
a ventilation hole formed in the ventilation member receiving portion and communicating with the insertion portion;
On the body portion, a plurality of engaging portions that are formed to protrude in the vertical direction to the outer portion of the air-permeable member receiving portion,
and a cap part coupled to the body part through the locking part. The method of claim 1,
The diaphragm part,
The electronic control device, characterized in that the diameter is smaller than that of the enlarged diameter part. 3. The method of claim 2,
The insertion portion is partially inserted into the housing through the coupling portion and
The electronic control device, characterized in that a part of the insertion part inserted into the housing passes through a board hole formed in the printed circuit board. delete The method of claim 1,
A gap is formed between the plurality of locking parts,
and the air permeable member distributes air between the inside and outside of the housing through the gap. The method of claim 1,
The electronic control device, characterized in that the inlet of the ventilation hole is formed in a streamlined shape. The method of claim 1,
The electronic control device, characterized in that the upper portion of the cap is provided with a unique code printing unit indicating the unique code of the pressure compensating member. 4. The method of claim 3,
The insert is
A plurality of fixing parts, one end of which is formed to extend downwardly from the air-permeable member accommodating part;
a housing fixing part formed on one end of the fixing part on the outer circumferential surface of the fixing part and fixed to the end of the reducing diameter part through the reduced diameter part;
and a board fixing part formed on the other end of the fixing part on the outer circumferential surface of the fixing part and fixed to the printed circuit board. 9. The method of claim 8,
The other end of the fixing part passes through the substrate hole and comes into contact with the lower inner surface of the housing. 9. The method of claim 8,
An upper portion of the housing fixing part is formed to protrude horizontally from an outer circumferential surface of the fixing part in a radial direction, and the diameter of the housing fixing part is larger than that of the substrate fixing part. 11. The method of claim 10,
The electronic control device according to claim 1, wherein the housing fixing part is formed to have a smaller diameter from the upper part to the lower part. 9. The method of claim 8,
The substrate fixing unit,
and a board fixing groove inserted into the printed circuit board on a horizontal plane,
wherein the substrate fixing groove is coupled to the printed circuit board at a portion where the substrate hole is located. 12. The method of claim 11,
The electronic control device characterized in that the reduced diameter portion is formed to correspond to a shape of the housing fixing portion. 14. The method of claim 13,
The plurality of fixing parts,
While the housing fixing part passes through the reduced diameter part, the mutual distance becomes small,
The electronic control device according to claim 1, wherein the housing fixing part is disposed to be spaced apart from each other in a radial direction after the housing fixing part passes through the reduced diameter part. 4. The method of claim 3,
The substrate hole is
An electronic control device formed in a central portion of the printed circuit board. 9. The method of claim 8,
The pressure compensating member,
and a sealing part inserted into the outer circumferential surface of the fixing part and disposed between the atmospheric pressure correcting part and the housing fixing part. 17. The method of claim 16,
The sealing part,
An electronic control device, characterized in that it is seated on the diameter-reduced portion. The method of claim 1,
Further comprising a connector coupled to the housing,
The connector is
One side of the electronic control device is inserted into an opening provided on one side of the housing to be electrically connected to the printed circuit board inside the housing.

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